First, this download will block parallel downloads.

首先，此下载将阻止并行下载。

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Setting the Source property on Image does not block running thread till download completes so code will continue executing and your progress bar will be invisible immediately.

设置源房产的形象呢不块运行的线程直到下载完成，代码将继续执行，你将进度条看不见的立即。

youdao

Antivirus makers need to know the virus to be able to assign it a signature and make the file detectible to block the download, according to Thakur.

CNN: Computer spyware is newest weapon in Syrian conflict